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Sensitivity study of anomalous HZZ couplings at a future Higgs factory
Authors:Hua-Dong Li  Cai-Dian Lü  Lian-You Shan
Institution:1. Institute of High Energy Physics, CAS, Beijing 100049, China2. School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:We study the sensitivity of constraining the model independent HZZ coupling based on the effective theory up to dimension-6 operators at a future Higgs factory. Using the current conceptual design parameters of the Circular Electron Positron Collider, we give the experimental limits for the model independent operators given by the total Higgsstrahlung cross-section and the angular distribution of Z boson decays. In particular, we give the very small sensitivity limit for the CP violation parameter g, which will be a clear window to test the Standard Model and look for new physics signals
Keywords:Higgs  new physics  effective field theory  CEPC
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